參數(shù)資料
型號： ST72C254G2M1
英文描述： 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY. ADC. 16-BIT TIMERS. SPI.
中文描述： 8位單電壓閃存微控制器。 ADC的。 16位定時器。的SPI。
文件頁數(shù)： 71/140頁
文件大?。?/td> 1349K
代理商： ST72C254G2M1
ST72104G, ST72215G, ST72216G, ST72254G
36/140
11 MISCELLANEOUS REGISTERS
The miscellaneous registers allow control over
several different features such as the external in-
terrupts or the I/O alternate functions.
11.1 I/O PORT INTERRUPT SENSITIVITY
The external interrupt sensitivity is controlled by
the ISxx bits of the Miscellaneous register and the
OPTION BYTE. This control allows having two ful-
ly independent external interrupt source sensitivi-
ties with configurable sources (using EXTIT option
bit) as shown in Figure 23 and Figure 24.
Each external interrupt source can be generated
on four different events on the pin:
s
Falling edge
s
Rising edge
s
Falling and rising edge
s
Falling edge and low level
To guarantee correct functionality, the sensitivity
bits in the MISCR1 register must be modified only
when the I bit of the CC register is set to 1 (inter-
rupt masked). See I/O port register and Miscella-
neous register descriptions for more details on the
programming.
11.2 I/O PORT ALTERNATE FUNCTIONS
The MISCR registers manage four I/O port miscel-
laneous alternate functions:
s
Main clock signal (fCPU) output on PC2
s
SPI pin configuration:
–SS pin internal control to use the PB7 I/O port
function while the SPI is active.
– Master output capability on MOSI pin (PB4)
deactivated while the SPI is active.
– Slave output capability on MISO pin (PB5) de-
activated while the SPI is active.
These functions are described in detail in the Sec-
tion 11.3 "MISCELLANEOUS REGISTER DE-
SCRIPTION" on page 37.
Figure 23. Ext. Interrupt Sensitivity (EXTIT=0)
Figure 24. Ext. Interrupt Sensitivity (EXTIT=1)
ei0
INTERRUPT
SOURCE
IS00
IS01
MISCR1
SENSITIVITY
CONTROL
PA7
PA0
PC5
PC0
PB7
PB0
IS10
IS11
MISCR1
SENSITIVITY
CONTROL
ei1
INTERRUPT
SOURCE
PA7
PA0
IS00
IS01
MISCR1
SENSITIVITY
CONTROL
ei0
INTERRUPT
SOURCE
ei1
INTERRUPT
SOURCE
IS10
IS11
MISCR1
SENSITIVITY
CONTROL
PB7
PB0
PC5
PC0
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72C254G2M3 功能描述:8位微控制器 -MCU ST72104G ST72215G ST72254G 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST72C254G2M3/TR 功能描述:8位微控制器 -MCU 8B MCU SINGLE VLTG FLASH MEMORY RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST72C254G2M6 功能描述:8位微控制器 -MCU Flash 8K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
ST72C254G2M6 制造商:STMicroelectronics 功能描述:8BIT MCU FLASH 8K 72C254 SOIC28
ST72C254G2M6/TR 制造商:ST 功能描述:0
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